Schedule

Oct 17 - Hjørdis Schlüter (University of Helsinki)

Title: Boundary determination in anisotropic elasticity

Abstract:

This is joint work with Joonas Ilmavirta, Mikko Salo and Daniel Windisch. I will talk about the elastic wave equation that models waves that propagate through elastic media. We are particularly interested in materials that are highly anisotropic and aim at recovering the density of mass and the so-called stiffness tensor, that capture the elasticity of the material, from exterior measurements. The exterior measurement that we consider is the Dirichlet-to-Neumann map. I will talk about a recent result, where we for generic stiffness tensor fields are able to determine the normalized stiffness tensor (where we are not able to distinguish between density and stiffness tensor) at the boundary of the medium. For this result we need a construction of special solutions and employ tools from algebraic geometry.

Oct 17, 15:45 - Organizational meeting

Oct 24 - Hendrik Baers (University of Bonn) - Joint seminar with Prof. Rüland's research group

Title: TBA

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Oct 31 - Michel Alexis (University of Bonn)

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Nov 7

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Nov 14 - Fabian Höfer (University of Münster)

Title: TBA

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Nov 21

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Nov 28 - Bonn-Cologne Analysis & PDE Day 2025

Location: Hörsaal Mathematisches Institut (Room 203), Universität zu Köln

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Our group member Ruoyuan Liu will give a talk in this event.

Dec 5

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Dec 12

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Dec 19

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Jan 9

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Jan 16 - Jiawei Li (University of Edinburgh)

Title: TBA

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Jan 23

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Jan 30

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Feb 6 - Niko Nikov (University of Edinburgh)

Title: TBA

Abstract: TBA